Malicious PDF — malware analysis report

Static analysis result for SHA-256 7196f9c0914020f5…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 22:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 865ef4958bcfd93f8407b3897f54cee7 SHA-1: 5cabb8c2c169c3e8f4e2fbb37cf732b0d1bf465e SHA-256: 7196f9c0914020f510e6bb206dbee7a3e0061d54fd7f57e74077b761039b64a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a deceptive title and numerous embedded links, many of which point to a link farm designed to redirect users. One of these links, 'https://ttraff.ru/wix?keyword=sunday+school+attendance+chart', is flagged as a malicious redirector. The document's structure and the presence of many external PDF links suggest an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=sunday+school+attendance+chart
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3023/9642/files/48137212623.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/48967517909.pdf
    • https://cdn.shopify.com/s/files/1/0459/6033/1423/files/dugewipew.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/brushless_dc_motor_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8986/files/jupiter_asset_management_annual_report_2018.pdf
    • https://static.usrfiles.com/ugd/fa6f14_58d01851e33e4d4a9706eb6dab777572.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc1cc4dc9f2946f19ac88e1be94eb165.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_ed06aafac84b41a89e32f4d16e87504f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f39526450b84a16907df117671e9271.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be3f9a172cd4177b11731fd3b77c14b.pdf
    • https://static.usrfiles.com/ugd/67f5f7_66fc3a92e3034387a4af8225262faced.pdf
    • https://static.usrfiles.com/ugd/0aab01_8add0deda34547f989e62beac1df51b2.pdf
    • https://static.usrfiles.com/ugd/912de2_ee8a467d03c2408c86f64bfc73867fad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/boximugamekogaj.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/lodash_group_by.pdf
    • https://cdn.shopify.com/s/files/1/0447/3962/5111/files/latin_to_gcse_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0460/1272/7457/files/pibife.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/motor_insurance_certificate.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006993.bin
7a712321c23979614a3825ceb8f1dc38925d32177a27d173b1e58bf3eda3807f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6993 5232 bytes
font_01_sfnt_off00007b5f.bin
8a56c8b5ceb4239502facc625168f15cfc5abba18b2cb4cbf15bfba72c42e1b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 10224 bytes

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